Messages in this thread | | | From | Jiri Olsa <> | Date | Tue, 2 Aug 2022 12:46:42 +0200 | Subject | Re: [PATCH bpf-next v2 2/3] bpf: export crash_kexec() as destructive kfunc |
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On Tue, Aug 02, 2022 at 11:10:29AM +0200, Artem Savkov wrote: > Allow properly marked bpf programs to call crash_kexec(). > > Signed-off-by: Artem Savkov <asavkov@redhat.com> > --- > kernel/kexec_core.c | 21 +++++++++++++++++++++ > 1 file changed, 21 insertions(+) > > diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c > index 4d34c78334ce..9259ea3bd693 100644 > --- a/kernel/kexec_core.c > +++ b/kernel/kexec_core.c > @@ -39,6 +39,8 @@ > #include <linux/hugetlb.h> > #include <linux/objtool.h> > #include <linux/kmsg_dump.h> > +#include <linux/btf.h> > +#include <linux/btf_ids.h> > > #include <asm/page.h> > #include <asm/sections.h> > @@ -1238,3 +1240,22 @@ void __weak arch_kexec_protect_crashkres(void) > > void __weak arch_kexec_unprotect_crashkres(void) > {} > + > +#ifdef CONFIG_DEBUG_INFO_BTF_MODULES > +BTF_SET8_START(kexec_btf_ids) > +BTF_ID_FLAGS(func, crash_kexec, KF_DESTRUCTIVE) > +BTF_SET8_END(kexec_btf_ids) > + > +static const struct btf_kfunc_id_set kexec_kfunc_set = { > + .owner = THIS_MODULE, > + .set = &kexec_btf_ids, > +}; > + > +static int __init crash_kfunc_init(void) > +{ > + register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &kexec_kfunc_set); > + return 0;
should we do 'return register_btf_kfunc_id_set(...' in here?
jirka
> +} > + > +subsys_initcall(crash_kfunc_init); > +#endif > -- > 2.35.3 >
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